闭关绝市

Explanation: Closed mark, trade with the outside world. 　　Source: Qing Lin, "to be the King of England issued the encyclical issued Xi": "alien thing, but for the play are good, not essential, that is, non-Chinese to be, how hard must city retreat." 　　Examples: ~ China is not, and can not practice it often safety. ★ Chen Chi "<Prime threats I> sequence"